What are the symptoms of excessively high SCR inlet exhaust temperature?
2 Answers
Symptoms of excessively high SCR inlet exhaust temperature include flashing warning lights, MIL light illumination, and no AdBlue consumption. Below are the specific causes of excessively high SCR inlet exhaust temperature: 1. Engine-related factors: The ignition system, fuel supply system, air supply system, and vehicle secondary combustion system can all affect the combustion products, thereby influencing exhaust parameters. 2. Damaged three-way catalytic converter: Poor pollutant conversion leads to exhaust test data falling outside the standard range, usually caused by the three-way catalytic converter. It may be damaged, and it is recommended to replace the three-way catalytic converter before retesting.
Recently, when my car's SCR inlet exhaust temperature exceeded the limit, the vehicle behaved very abnormally. First, a yellow warning light appeared on the dashboard, resembling a small flashing engine icon, followed by a noticeable loss of power. The throttle response became sluggish, giving a strained feeling. Fuel consumption also inexplicably increased by one or two liters per 100 kilometers. More troublingly, the urea solution seemed not to be injected, and there was a strange smell inside the car, like burnt plastic. When I took it to the repair shop, the mechanic said it might be due to a blocked exhaust pipe or a faulty temperature sensor. Driving like this for a long time could lead to excessive exhaust emissions and even fines. I suggest that once you notice these symptoms, don't push through—get it checked immediately, or the repair costs could be even higher. From this experience, I learned that regular inspections of the exhaust system are truly important to avoid the hassle of breaking down on the road and facing a pile of troubles.
